Feofilov Symposium on Spectropscopy of Crystals Activated by Rare-Earth and Transition Metal Ions最新文献_第3页

Population of higher-energy levels in LiY1-xErxF4(x=0.003/1) crystals under CW IR laser-diode pumping 连续波红外激光二极管泵浦作用下LiY1-xErxF4(x=0.003/1)晶体中的高能级居群

Feofilov Symposium on Spectropscopy of Crystals Activated by Rare-Earth and Transition Metal Ions Pub Date : 2002-07-12 DOI: 10.1117/12.475342

A. Tkachuk, I. K. Razumova, A. Mirzaeva, G. E. Novikov, O. A. Orlov, A. Malyshev, V. Gapontsev

{"title":"Population of higher-energy levels in LiY1-xErxF4(x=0.003/1) crystals under CW IR laser-diode pumping","authors":"A. Tkachuk, I. K. Razumova, A. Mirzaeva, G. E. Novikov, O. A. Orlov, A. Malyshev, V. Gapontsev","doi":"10.1117/12.475342","DOIUrl":"https://doi.org/10.1117/12.475342","url":null,"abstract":"Steady-state population of 7 lowest excited erbium levels in LiY1-xErxF4 (YLF:Er3+) crystals was studied under up conversion CW InGaAs laser-diode pumping with varied power density. Theoretical and experimental concentration and power dependencies of population of higher-energy radiative levels were obtained. Relative changes in populations of studied levels in YLF:Er3+ crystals were experimentally controlled by visible spectra of steady-state luminescence in the wavelength ranges corresponding to transitions 4S3/2 yields 4I15/2 micrometers and 4F9/2 yields 4I15/2 micrometers . IR-pumped luminescence kinetic curves of higher-energy transitions 4S3/2 yields 4I15/2 and 2H9/2 yields 4I15/2 were recorded. The energy-transfer mechanisms were determined, and the predominant mechanisms responsible for up conversion excitation were elucidated. Microparameters of energy transfer and concentration dependencies of the self-quenching rates and non-linear coupling were obtained on the basis of theoretical and experimental estimates of the rates of intra- and intercenter relaxation processes allowing for statistics of coupling between the impurity centers in the system. The steady-state dependencies of population on the erbium concentration and pumping power density were calculated within the framework of rate balance equations. Good agreement between the theory and experimetnal data was obtained.","PeriodicalId":312884,"journal":{"name":"Feofilov Symposium on Spectropscopy of Crystals Activated by Rare-Earth and Transition Metal Ions","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128428858","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Multiphonon optical bands of Cr3+ ion in sulphide spinels: a pseudo Jahn-Teller model 硫化物尖晶石中Cr3+离子的多声子光学带:一个伪Jahn-Teller模型

Feofilov Symposium on Spectropscopy of Crystals Activated by Rare-Earth and Transition Metal Ions Pub Date : 2002-07-12 DOI: 10.1117/12.475341

A. Al Haroun, L. Culiuc, V. Mirovitskii, A. Nateprov, A. Palii, V. Tezlevan, B. Tsukerblat

{"title":"Multiphonon optical bands of Cr3+ ion in sulphide spinels: a pseudo Jahn-Teller model","authors":"A. Al Haroun, L. Culiuc, V. Mirovitskii, A. Nateprov, A. Palii, V. Tezlevan, B. Tsukerblat","doi":"10.1117/12.475341","DOIUrl":"https://doi.org/10.1117/12.475341","url":null,"abstract":"In this article we report the adiabatic and dynamic solutions of the pseudo Jahn-Teller (JT) problem in the orbital triplet 4T2(t22e) of Cr3+ ion resulting from the combined effect of tetragonal (E) vibrations and trigonal crysatl field in sulphide spinels lattice. We discuss the general properties of the adiabatic surfaces that give a clear qualitative insight on the main features of the optical bands. The shapes of the absorption bands are calculated on basis of the quantum-mechanical solution of the dynamic pseudo JT problem taking into account the effective electric-dipole moment involving odd- parity crystal field potential. Pseudo JT (4A1 + 4E) (direct product) e interaction is shown to produce a complicated structure of the multiphoton optical bands and leads to a specific polarization effect. Calculated shape function for the U-band absorption proves to be in a good agreement with the excitation spectrum of (alpha) - ZnAl2S4 tiospinel doped with chromium ions, the experimentally detected peculiarities of the structure of this band are shown to be an evidence of strong pseudo JT interaction in the excited state.","PeriodicalId":312884,"journal":{"name":"Feofilov Symposium on Spectropscopy of Crystals Activated by Rare-Earth and Transition Metal Ions","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128223493","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Optical properties of the Cm3+ ion in single crystals 单晶中Cm3+离子的光学性质

Feofilov Symposium on Spectropscopy of Crystals Activated by Rare-Earth and Transition Metal Ions Pub Date : 2002-07-12 DOI: 10.1117/12.475326

N. Edelstein

{"title":"Optical properties of the Cm3+ ion in single crystals","authors":"N. Edelstein","doi":"10.1117/12.475326","DOIUrl":"https://doi.org/10.1117/12.475326","url":null,"abstract":"The Cm3+ ion, atomic number 96, has the electronic configuration and is the actinide analog of the lanthanide ion Gd3+. The ground term has only approximately 87 percent 8S7/2 parentage due to the large spin-orbit interaction as compared to the almost 100 percent 8S7/2 parentage for Gd3+. The electrostatic interaction between equivalent electrons in the f7 shell results in a large gap between the octet state of the ground term and the sextet states of the excited multiplets. For Gd3+ this splitting results in a gap greater than 30,000 cm-1. The greater spatial extent of the 5f electron shell results in a smaller electrostatic interaction between equivalent electrons in the 5f shell than in the 4f shell. Thus for Cm3+, this splitting is on the order of 16,000 cm-1. The ground term multiplet splitting is small, because the largest component of the ground multiplet has zero angular momentum. However for Gd3+ in most crystals, this ground term splitting is much less than approximately 1 cm-1. Early detailed studies of the Cm3+ optical spectra were performed with the 244Cm isotope. During the past decade or so, multi-milligram quantities of 248Cm have become available. A number of single crystals have been doped with the 248Cm isotope and optical studies of these samples have been performed using laser selective excitation and fluorescence techniques. Excited state absorption studies allowed the collected of data to 40,000 cm-1 using two visible lasers. Results from these experiments will be reviewed and comparisons will be made between the 5f and 4f series.","PeriodicalId":312884,"journal":{"name":"Feofilov Symposium on Spectropscopy of Crystals Activated by Rare-Earth and Transition Metal Ions","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131401685","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

5d-4f radiative transitions in Ce-doped Si 3-xAlxOyN4-y solid solutions 掺ce Si 3-xAlxOyN4-y固溶体中的5d-4f辐射跃迁

Feofilov Symposium on Spectropscopy of Crystals Activated by Rare-Earth and Transition Metal Ions Pub Date : 2002-07-12 DOI: 10.1117/12.475328

B. V. Chernovetz, A. Feopentov, F. F. Grekov, S. B. Mikhrim, A. N. Mishin, Alexander S. Potapov

引用次数: 1

Optical absorption of Eu 3+ and Eu 2+ in europium oxides and europium fluorides 氧化铕和氟化铕中铕3+和铕2+的光学吸收

Feofilov Symposium on Spectropscopy of Crystals Activated by Rare-Earth and Transition Metal Ions Pub Date : 2002-07-12 DOI: 10.1117/12.475346

V. Zinchenko, N. Efryushina, O. G. Eryomin

引用次数: 1

MIR spectroscopy of Tb3+-doped low-phonon crystals and polycrystalline fibers 掺Tb3+低声子晶体和多晶光纤的MIR光谱

Feofilov Symposium on Spectropscopy of Crystals Activated by Rare-Earth and Transition Metal Ions Pub Date : 2002-07-12 DOI: 10.1117/12.475345

L. Butvina, E. Dianov, A. Okhrimchuk, N. V. Lichkova, V. Zavgorodnev

引用次数: 2

Spectra and relaxation of electronic excitations in CsCdBr3:Yb3+ and CsCdBr3:Nd3+ monocrystals CsCdBr3:Yb3+和CsCdBr3:Nd3+单晶中电子激发的光谱和弛豫

Feofilov Symposium on Spectropscopy of Crystals Activated by Rare-Earth and Transition Metal Ions Pub Date : 2002-07-12 DOI: 10.1117/12.475344

M. Gafurov, A. Iskhakova, I. Kurkin, S. P. Kurzin, B. Malkin, S. I. Nikitin, S. Orlinskii, R. Rakhmatullin, G. S. Shakurov, V. Tarasov, R. Demirbilek, J. Heber

{"title":"Spectra and relaxation of electronic excitations in CsCdBr3:Yb3+ and CsCdBr3:Nd3+ monocrystals","authors":"M. Gafurov, A. Iskhakova, I. Kurkin, S. P. Kurzin, B. Malkin, S. I. Nikitin, S. Orlinskii, R. Rakhmatullin, G. S. Shakurov, V. Tarasov, R. Demirbilek, J. Heber","doi":"10.1117/12.475344","DOIUrl":"https://doi.org/10.1117/12.475344","url":null,"abstract":"Experimental and theoretical studies of the optical and EPR spectra, and the spin-lattice relaxation in CsCdBr3 crystals containing 0.1, 0.3 and 1.0 mol. Percent of impurity Yb3+ ions have been fulfilled. In the optical excitation spectrum, a broad charge transfer band has been detected in the wave-number range of 25000-35000 cm-1. The hybridization of the excited electron configuration corresponding to the charge transfer from the ligand (Br) 4p closed shells on the ground 4f13 configuration of the ytterbium ion is considered to interpret the anomalously large crystal field splitting of het 2F5/2 multiplet. The EPR spectra with comparable intensities of the axial single-ion and symmetric dimer centers in the sample containing 0.3 mol percent of impurity Yb3+ ions were observed. Spin-lattice relaxation rates and linewidth sin the EPR spectra of the single-ion and dimer centers were measured in the temperature range of 1.5-35 K at the frequency of 9.5 GHz at different directions of the applied magnetic field relative to the crystal symmetry axis. Experimental results are analyzed in the framework of the microscopic theory of the electron-phonon interaction with taking into account peculiarities of the phonon spectrum of the impurity CsCdBr3 lattice. High- frequency EPR spectra of dimer centers in CsCdBr3 crystals containing 0.2 and 0.5 mol. Percent of impurity Nd3+ ions were taken in the range of 205-250 GHz at 4.2 K in the magnetic field sup to 0.8 T parallel to the crystal symmetry axis. The crystal field splitting between the first excited and the ground Kramers doublets, and magnetic splitting factors of these doublets were determined. AN estimate of the isotopic ferromagnetic exchange constant A equals (2.3 +/- 0.3) 10-3 cm-1 in symmetric dimer centers formed by impurity Nd3+ ions was obtained from the zero-field splitting of the EPR signals.","PeriodicalId":312884,"journal":{"name":"Feofilov Symposium on Spectropscopy of Crystals Activated by Rare-Earth and Transition Metal Ions","volume":"94 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125456248","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Spectroscopic properties of TR3+ -doped double chloride crystals 掺TR3+双氯化物晶体的光谱特性

Feofilov Symposium on Spectropscopy of Crystals Activated by Rare-Earth and Transition Metal Ions Pub Date : 2002-07-12 DOI: 10.1117/12.475337

A. Tkachuk, S. Ivanova, L. Isaenko, A. Yelisseyev, D. I. Mironov, M. Nostrand, R. Page, S. Payne

引用次数: 10

Magnetic field effects in optical and far IR spectra of LiTmF4 crystals 磁场对LiTmF4晶体光学和远红外光谱的影响

Feofilov Symposium on Spectropscopy of Crystals Activated by Rare-Earth and Transition Metal Ions Pub Date : 2002-07-12 DOI: 10.1117/12.475349

R. Abdulsabirov, A. A. Kazantsev, S. Korableva, B. Malkin, S. Nikitin, A. Stolov, M. Tagirov, D. Tayurskii, J. van Tol

引用次数: 2

Optical and EPR centers involving 3d metals in diamond 金刚石中涉及三维金属的光学和EPR中心

Feofilov Symposium on Spectropscopy of Crystals Activated by Rare-Earth and Transition Metal Ions Pub Date : 2002-07-12 DOI: 10.1117/12.475322

J. Baker

引用次数: 2